Feb 21, 2016  Sorry - I assumed that you had to stay with 10.5.8. The usual reason is when using a PowerPC Mac, such as a G4 or G5 Mac. Those cannot be upgraded to any newer OS X version That solution that I posted, with the PPC version of a nice web browser, is designed for those that want, or need to stay with PPC versions.

Article ID = 87
Article Title = Mac Security Article #7 - Older Operating Systems
Article Author(s) = Graham Needham (BH)
Article Created On = 29th June 2012
Article Last Updated = 21st January 2020
Article URL = https://www.macstrategy.com/article.php?87
Article Brief Description:
How to secure older/not supported/out of date Mac operating systems

Securing Older Operating Systems

This is number seven in a series of MacStrategy security articles. Applications providedwith the operating system can be at high risk from attack especially those that open common document formats likemovies, JPEGs/pictures, PDF, Office (Word/Excel/PowerPoint), RTF files and those that access the internet i.e. web browsers e.g. Safari, iChat/Messages and email applications e.g Apple's Mail. Thisarticle will help you secure your older operating system and also source up-to-date, more secure applications if they are available (alternative applications are listed in OS support order not in any order of recommendation). This article hasthe following sections:NOTE: Due to changes in company support policies, security requirements (SSL and early versions of TLS are now broken), Apple's developersoftware output/OS support, and third-party software applications that use the Sparkleupdate mechanism must now use a new secure version which has higher minimum system requirements, it is becomingincreasingly more difficult for developers to support older Mac operating systems:

• 2019 - Apple, Adobe and Microsoft now only support the current and 1 or 2 versions of macOS back
• Spring 2019 saw the end of secure Adobe PDF support on operating systems prior to macOS 10.12
• 2017 saw the end of secure web browser support on OS X 10.9 or earlier
• 10th October 2017 - Microsoft Office 2011 end of support
• 15th October 2017 - Adobe Reader/Acrobat XI(11) end of support
• 2017 Sparkle version 1.13.1 or later requires OS X 10.7 or later

Forthcoming important end of (security) support dates

• 7th April 2020 - Adobe Acrobat Pro / Reader 2015
• September/October 2020 - macOS 10.13 High Sierra
• 13th October 2020 - Microsoft Office 2016
• September/October 2021 - macOS 10.14 Mojave / 32-bit application support
• 6th June 2022 - Adobe Acrobat Pro / Reader 2017

macOS / OS X / Mac OS X

The following operating systems are no longer fully supported/updated by Apple and if you are still running one of these there is a security risk to you and your data especially if you use it to access the internet. You should therefore read all of this article and heed the recommendations given within it.

• macOS 10.12 Sierra (as of 7th October 2019)
• OS X 10.11 El Capitan (as of 17th September 2018)
• OS X 10.10 Yosemite (as of 25th September 2017)
• OS X 10.9 Mavericks (as of 1st September 2016)
• OS X 10.8 Mountain Lion (as of 30th September 2015)
• OS X 10.7 Lion (as of 16th October 2014)
• Mac OS X 10.6 Snow Leopard
• Mac OS X 10.5 Leopard (both PowerPC and Intel versions)
• Mac OS X 10.4 Tiger (both PowerPC and Intel versions)
• Mac OS X 10.3 Panther
• Mac OS X 10.2 Jaguar
• Mac OS X 10.1 Puma
• Mac OS X 10.0 Cheetah
• Mac OS 9 (Classic) or earlier

Q. How can I tell which version of macOS / OS X / Mac OS X I am running?

A. Go to Apple menu (top left) > About This Mac > check the version reported for macOS / OS X / Mac OS X.
Apple provided guides for securing some versions of their operating systems. Although quite technical they are excellent for helping you to secure your old OS:

• OS X 10.8 Mountain Lion = Product security, validations, and guidance for OS X (click on 'Common Criteria certification' and download the admin guide)
• OS X 10.7 Lion = Product security, validations, and guidance for OS X (click on 'Common Criteria certification' and download the admin guide)
• Mac OS X 10.6 Snow Leopard = Mac OS X Security Configuration Guides
• Mac OS X 10.6 Snow Leopard Server = Mac OS X Security Configuration Guides

Third parties, such as the National Institute for Standards and Technology (NIST), also offer guides for securing Apple operating systems. Again, although quite technical they are excellent for helping you to secure your old OS:

• OS X 10.10 Yosemite = Defense Information Systems Agency STIG - Security Technical Implementation Guide
• OS X 10.10 Yosemite = NIST Computer Security Division
• OS X 10.9 Mavericks = Center for Internet Security (CIS)
• OS X 10.8 Mountain Lion = Defense Information Systems Agency STIG - Security Technical Implementation Guide
• Mac OS X 10.6 Snow Leopard = Defense Information Systems Agency STIG - Security Technical Implementation Guide
• Mac OS X 10.6 Snow Leopard = Center for Internet Security (CIS)
• Mac OS X 10.5 Leopard = Defense Information Systems Agency
• Mac OS X 10.5 Leopard = DoD Consensus Security Configuration Checklist
• Mac OS X 10.5 Leopard = Center for Internet Security (CIS)
• Mac OS X 10.3 Panther = NSA Security Configuration Guide

Apple software (included with macOS / OS X / Mac OS X)

For Apple software not included with macOS / OS X / Mac OS X e.g. Pages, Numbers, Keynote, iMovie, Garageband, please see our article on Keeping Apple Software Products Up-To-Date.
Although any Apple application software provided with the OS will generally be no longer supported/updated by Apple there are specific applications/components that are at much higher risk than others so here are some recommendations:

Messages / iChat

As this application accesses the internet and malware is easily spread via instant messaging services it is highly recommended, if possible, to use an alternative instant messaging application that is kept up-to-date with security patches:

• AOL Instant Messaging aka AIM - discontinued on 17th December 2017

NOTE: It is not recommended to use the following products as they use the OS X/Safari 'webkit' rendering engine:

• Adium (multi protocol client including Jabber)
• Yahoo! Messenger (shut down 17th July 2018)
• MSN/Microsoft Messenger (shut down October 2014)

iTunes

iTunes is available to download separately and supports a few macOS / OS X versions back (currently macOS 10.11.4 or later).
iTunes updates are now offered as part of the standard Apple Software Update feature of macOS.
SECURITY WARNING: iTunes is no longer supported on OS X 10.9.5 or earlier. If you still use OS X 10.9.5 or earlier you are strongly recommended to be very careful with what media you add to your iTunes library - always and only add files from legitimate/trusted sources.Instructions for removing iTunes using a Macintosh can be found in our article here.
Links for downloading older versions of iTunes can be found in our article here.
Alternative media managers:

• Swinsian (OS X 10.7 or later)
• Kodi formerly known as XBMC (OS X 10.8 or later)
• beaTunes (OS X 10.11 or later)
• Wondershare TunesGo (web site doesn't list any system requirements)
• doubleTwist (web site doesn't list any system requirements)
• Tomahawk

Mail

As this application accesses the internet and malware is easily spread via email/attachments it is highly recommended to use an alternative email application that is kept up-to-date with security patches:

• Tenfourbird (PowerPC only)
• GyazMail (Mac OS X 10.1 or later - 10.3.9 or later recommended)
• Powermail (Mac OS X 10.6 or later)
• MailMate (OS X 10.7 or later)
• Mailsmith (OS X 10.8.5 to macOS 10.14)
• Mozilla Thunderbird (OS X 10.9 or later
• Microsoft Outlook 2016 (part of Office 2016 - macOS 10.12 or later - support ends on 13/10/2020)

NOTE: It is not recommended to use 'Entourage 2008' as it uses the OS X/Safari 'webkit' rendering engine.
NOTE: It is not recommended to use 'Mailforge' or 'Sparrow' as they have been discontinued.
NOTE: You can change the default email application by opening Mail > go to Mail menu > Preferences > General tab > select your preferred application from the 'Default email reader' pop-up menu.

Preview

Malware is easily spread via bad documents e.g. graphics/JPEGs and PDFs so it is highly recommended to use alternative applications for these:

• Lemkesoft Graphic Converter (Mac OS X 10.3 or later)
• HexCat ViewIt (Mac OS X 10.3 or later)

See also the PDF documents section below.
NOTE: You can change the default application that opens specific documents by selecting (clicking once) a document icon in the Finder > go to File menu > Get Info (Command-I) > under the 'Open with…' heading select your preferred application from the pop-up menu and then click the 'Change All…' button.

Safari

See the Web Browsers section below.
NOTE: You can change the default web browser application by opening Safari > go to Safari menu > Preferences > General tab > select your preferred application from the 'Default web browser' pop-up menu.

TextEdit (Word Processing)

Malware is easily spread via bad documents so it is highly recommended to use alternative applications for text, RTF, Word files:

• Microsoft Word 2016 (part of Office 2016 - macOS 10.12 or later - support ends on 13/10/2020)
• Bean (Mac OS X 10.5 or later - as of March 2013 this product is no longer being actively developed)

See also the Microsoft Office section below.
NOTE: Microsoft Office in some respects may be less secure than an old version of preview if you do not keep it up-to-date so please see our article on Keeping Microsoft Software Products Up-To-Date.
NOTE: It is not recommended to use 'SubEthaEdit' or 'textmate' as they use the OS X/Safari 'webkit' rendering engine.
NOTE: You can change the default application that opens specific documents by selecting (clicking once) a document icon in the Finder > go to File menu > Get Info (Command-I) > under the 'Open with…' heading select your preferred application from the pop-up menu and then click the 'Change All…' button.

QuickTime including QuickTime Player

An alternative media player that supports older operating systems is VLC.
QuickTime updates are now offered as part of the standard Apple Software Update feature of macOS.
SECURITY WARNING: QuickTime is no longer supported with security updates on OS X 10.11 El Capitan or earlier.NOTE: You can change the default application that opens specific documents by selecting (clicking once) a document icon in the Finder > go to File menu > Get Info (Command-I) > under the 'Open with…' heading select your preferred application from the pop-up menu and then click the 'Change All…' button.

Non-Apple software but included with macOS / OS X / Mac OS X

As macOS / OS X / Mac OS X is based on UNIX there is a lot of third party software included and distributed by Apple as part of macOS / OS X / Mac OS X. These parts are no longer updated by Apple but may suffer serious (security) flaws and could be updated by the third parties themselves. However, patching/installing those updates on macOS / OS X / Mac OS X may, unfortunately, not be an easy task. Important security flaws are noted below:

BASH

For more information on the 'Shellshock' vulnerability see our blog post on the subject - Apple issued a security fix for OS X 10.7 Lion and later.

NTP

A serious security issue with NTP was reported and fixed on the 18th December 2014 - Apple issued a security fix for OS X 10.8 Mountain Lion and later. If you are running OS X 10.6 or earlier you are highly recommended to turn off automatic updating of the date and time or better yet, install an updated version of NTP:

• Go to Apple menu > System Preferences > Date & Time > Date & Time tab > UNTICK 'Set date and time automatically'.
• If you are running Mac OS X 10.6 someone has built a patch for you.
• If you are running OS X 10.7 or Mac OS X 10.5 and earlier there are instructions on building an updated NTP here (states for OS X 10.7 and 10.6 but should work for any previous version of macOS / OS X / Mac OS X).

Java

Mac OS X 10.6 and earlier include an Apple supplied version of Java - see the Internet Plug-ins section below for more information.

Microsoft Office (Word, Excel, PowerPoint documents)

Using office documents on older operating systems is becoming harder and harder. If possible you are better to move away from proprietary Microsoft office document formats to more standard formats for text, spreadsheet and presentation documents (and use up-to-date compatible software - see links below). Alternatively you copuld consider using an online office equivalent with an up-to-date browser.

Microsoft Office Suites and Applications No Longer Supported

• Microsoft Office 2011 (including 2011 versions of Word, Excel, Powerpoint, Outlook) support ended on the 10th October 2017
• Microsoft Office 2008 (including 2008 versions of Word, Excel, Powerpoint, Entourage) support ended on the 9th April 2013
• Microsoft Office 2004 (including 2004 versions of Word, Excel, Powerpoint, Entourage)
• Microsoft Office v.X (including v.X versions of Word, Excel, Powerpoint, Entourage)
• Microsoft Office 2001 (including 2001 versions of Word, Excel, Powerpoint)
• Microsoft Office 98 (including 98 versions of Word, Excel, Powerpoint)
• Microsoft Office 6.x (including Word, Excel, Powerpoint)
• Microsoft Office 4.x (including Word, Excel, Powerpoint)

If you are going to continue using Office 2004 or 2008 do not open Office documents from untrusted sources especially as email attachments or downloads from the internet – this includes but is not limited to the following document types:

• Word (.doc / .docx / .dot / .dotx / .docm / .dotm)
• Excel (.xls / .xlsx / .xltx / .xlsm / .xltm / .xlsb / .xlam / .xll)
• PowerPoint (.ppt / .pptx / .pptm / .potx / .potm / .ppam / .ppsx / .ppsm / .sldx / .sldm)

Office Suites (supported/updated)

• NeoOffice 2014 (£22.99 - OS X 10.8 or later)
• Apache OpenOffice (OS X 10.7 or later)
• LibreOffice (OS X 10.7 or later)
• NeoOffice 3.4.1 (£7 - Mac OS X 10.6 or later)
• Microsoft Office 2016 (macOS 10.12 or later - support ends on 13/10/2020)
• ThinkFree Office (Mac OS X 10.4 or later) - does not get regular updates

NOTE: A current version of Microsoft Office may, in some respects be less secure than an older version, if you do not keep it up-to-date so please see our article on Keeping Microsoft Software Products Up-To-Date.

Office Suites (online)

• Apple iCloud (Safari / Firefox / Google Chrome†)
• Microsoft Office online (Safari / Firefox / Google Chrome†)
• Google Docs (Safari / Firefox / Google Chrome†)
†NOTE: Secure browser minimum OS:
• Safari --> currently supported versions of macOS:

Q. What are the current, supported versions of macOS?

A. macOS 10.15 (Catalina), 10.14 (Mojave) and macOS 10.13 (High Sierra) are supported by Apple. The latest security updates are:
• macOS 10.15 - included in the macOS 10.15.4 Update
• macOS 10.14 - included in the macOS 10.14.6 Combo Update + Security Update 2020-002
• macOS 10.13 - included in the macOS 10.13.6 Combo Update + Security Update 2020-002
• SECURITY WARNING: macOS 10.12 and earlier are no longer supported with security updates - see our securing older operating systems article.
• Firefox --> OS X 10.9 or later)
• Chrome --> OS X 10.10 or later)

Word (Word Processing alternatives)

• Bean (Mac OS X 10.5 or later)

NOTE: It is not recommended to use 'SubEthaEdit' or 'textmate' as it uses the OS X/Safari 'webkit' rendering engine.

Excel (Spreadsheet alternatives)

• Mariner Calc (Mac OS X 10.5 or later)

Powerpoint (Presentation alternatives)

• Boinx FotoMagico (OS X 10.10 or later)

You may also could consider alternative presentation methods such as:

• A simple slideshow using a graphics/photo application.
• A (QuickTime) movie and use a media player application.
• A PDF document and using Adobe Reader.

Adobe Acrobat (PDF documents)

Malware is easily spread via bad PDF documents and is a common attack vector now, so it is highly recommended to use an alternative application to Apple's Preview for viewing/working with PDFs:

• Adobe Reader 2017/2019-DC (macOS 10.12 or later)
• Acrobat Pro updates = ftp://ftp.adobe.com/pub/adobe/acrobat/mac/
• Acrobat Reader updates = ftp://ftp.adobe.com/pub/adobe/reader/mac/

NOTE: Acrobat v11 became end of life on 15th October 2017.The Acrobat XI (11) auto-update feature no longer works on Mac OS X 10.6 Snow Leopard - this is a known problem for all 10.6 users so Acrobat/Reader updates must be installed manually - Acrobat updates are usually cumulative (combo type) updates so you can install the latest update version to get all the security updates. Updates can be downloaded manually via the Adobe FTP web site (you can navigate it and download from it using a normal web browser) - see links above.
NOTE: Acrobat v10 became end of life on 15th November 2015.
NOTE: Acrobat v9 became end of life on 26th June 2013.

• These versions are no longer supported/updated so if you are running OS X 10.9 or later you are recommended to remove all old versions and download/install a supported version.

NOTE: Qoppa 'PDF Studio' is not recommended as it requires Java.
NOTE: Adobe Reader in some respects may be less secure than an old version of preview if you do not keep it up-to-date so please see our article on Keeping Adobe Software Products Up-To-Date.

Web Browsers

There are plenty of old browsers you can install but we do not advocate the use of them on the modern internet. Only web browsers that are still supported/developed are listed here but note that some don't get regular updates:

Web browsers compatible with macOS 10.12 and later

• Mozilla Firefox
• Google Chrome
• Microsoft Edge

Web browsers compatible with OS X 10.10 and later

• Mozilla Firefox
• Google Chrome

Web browsers compatible with OS X 10.9 and later

• Mozilla Firefox

Web browsers compatible with OS X 10.7 and later

• Roccat - last updated in December 2018
• Seamonkey - does not get regular updates
• iCab - does not get regular updates

Web browsers compatible with Mac OS X 10.6

• TenFourFox (no plug-in support)
• Roccat - last updated in December 2018
• Seamonkey - does not get regular updates

Web browsers compatible with Mac OS X 10.5

• TenFourFox (no plug-in support)
• Roccat - last updated in December 2018
• Omniweb - does not get regular updates

Web browsers compatible with Mac OS X 10.4

• TenFourFox (no plug-in support)
• Omniweb - does not get regular updates

Web browsers compatible with PowerPC computers

• TenFourFox (no plug-in support)
• Omniweb - does not get regular updates

Web browsers compatible with Classic / Mac OS 9

Dead Browsers

• Citrio - no updates since 2015
• Camino - development discontinued on 31st May 2013
• Sunrise - no updates since 2012
• Stainless - no updates since 2011
• Microsoft Internet Explorer - no longer supported on/updated for Apple Macintosh computers

For more information on using web browsers securely see our other MacStrategy articles:

Internet Plug-ins

Most internet plug-ins are no longer supported/updated on older operating systems. Here is a list of some that are along with the OS versions supported:

• Adobe Flash (OS X 10.9 or later)
• Microsoft Silverlight (Mac OS X 10.6.8 or later) - support to end in October 2021
• Adobe Shockwave - discontinued in early 2017

NOTE: It is not recommended to use the 'Real Player' application as it uses the OS X/Safari 'webkit' rendering engine.
See also our Keeping Internet Web Browser Plug-ins Up-To-Date article. You should remove/disable all plug-ins found in the following locations and then install the latest plug-in using the above links where possible for your version of the OS:

• Macintosh HD > Library > Internet Plug-Ins
• For each user on the computer: Macintosh HD > Users >your home directory > Library > Internet Plug-Ins

Java Security for Mac Users > How To Disable/Secure Java

Java SE v6 and earlier are end of life and are no longer supported/updated. If you are running Mac OS X 10.6 or earlier you are recommended to disable Java and read up on securing older operating systems.

Q. How can I tell which version of macOS / OS X / Mac OS X I am running?

A. Go to Apple menu (top left) > About This Mac > check the version reported for macOS / OS X / Mac OS X.

Securing/Disabling Java SE in OS X 10.7 or later

1. Go to Apple menu > System Preferences > Java > (the Java Control Panel will open separately) > Security tab
• If the Java preference pane does not exist you do not have Java SE v7 or later installed. Go to the disabling Java SE v6 instructions below.
• If you have a Java preference pane and the Java Control Panel opens separately go to the 'Security' tab in the control panel. If there is no Security tab you have an old version of Java SE v7 installed - update Java SE v7 first, then come back to these instructions.
2. Set the 'Security Level' slider to 'Very High'.
3. If you don't use Java untick 'Enable Java content in the Browser'.
4. If you do use Java click 'Advanced Security Settings' and configure as required for your Java usage.
5. Now go to the 'Update' tab and tick 'Check for Updates Automatically'.
6. Now go to the 'General' tab, click 'Settings…' under 'Temporary Internet Files' and untick 'Keep temporary files on my computer' and click 'Delete Files…'. Click 'OK'.
7. You are now also recommended to switch off Java in your web browsers.

Disabling Java SE v6 in OS X 10.7 or later

1. Go to Macintosh HD > Applications > Utilities > Java Preferences > General tab.
NOTE: If you get a message stating 'To open 'Java Preferences,' you need a Java SE 6 runtime. Would you like to install one now?' click 'Not Now' (you do not have Java SE v6 installed - go to disabling the Java plug-in in your web browsers).
2. Make sure no Java versions are ticked under 'On'.
3. Then go to the 'Network' tab and untick 'Keep temporary files for fast access' and click 'Delete Files…'. Click 'OK'.
4. You are now also recommended to switch off Java in your web browsers.

NOTE: If you need Java and have installed Java Update 2012-006 or later from Apple you will have no Java Preferences in Applications > Utilities or a Java plug-in so you are recommended to install Java SE v7 to give you the most up to date Java RE, a Java plug-in and a Java Preferences pane in System Preferences.

Disabling Java SE v5/v6 in Mac OS X 10.5 or 10.6

NOTE: Java will not work at all including locally installed applications that may require it.

1. Go to Macintosh HD > Applications > Utilities > Java Preferences > General tab.
2. Make sure no Java versions are ticked under 'On'.
3. Then go to the 'Network' tab and untick 'Keep temporary files for fast access' and click 'Delete Files…'. Click 'OK'.
4. You are now also recommended to switch off Java in your web browsers.

Disabling Java SE in Mac OS X 10.4 or earlier

You cannot switch off Java in Mac OS X 10.4 or earlier and there is no Java Preferences so make sure you delete any (Java plug-ins and also switch off Java in your web browsers.

Disabling the Java plug-in In Your Web Browsers

NOTE: Java applets will not work in your web browser but locally installed Java applications may still work (see disabling the Java Runtime Environment for your OS).
NOTE: You need to disable the Java plug-in for each and every web browser that you use/have installed.

• Apple Safari 12 or later (for macOS 10.12 or later) - Java is not supported (because NPAPI plug-ins are not supported)
• Apple Safari up to version 11 - open Safari > go to Safari menu > Preferences… > Security tab > click 'Plug-in Settings…' > untick 'Java' in the list on the left
• Apple Safari 5.1.9 (for Mac OS X 10.6) / 6.0.4 (for OS X 10.7/10.8) or later - open Safari > go to Safari menu > Preferences… > Security tab > untick 'Allow Java' or you can tick it to enable it and you now have control of the Java plug-in for individual websites by clicking the 'Manage Website Settings…' button
• Google Chrome - Java is not supported (because NPAPI plug-ins are not supported)
• Chromium - Java is not supported (because NPAPI plug-ins are not supported)
• Mozilla Firefox - Java is not supported (because NPAPI plug-ins are not supported)
• iCab - open iCab > go to iCab menu > Preferences… > Java icon > untick 'Execute Java applets'
• Omniweb - open Omniweb > go to Omniweb menu > Preferences… > Security icon > untick 'Enable Java'
• Opera - Java 7 or later is not supported - plug-ins cannot be disabled
• Seamonkey - open Seamonkey > go to Seamonkey menu > Preferences… > select 'Scripts & Plugins' on the left under the 'Advanced' heading > untick 'Enable Plugins for Suite'
• Maxthon - TO BE CONFIRMED
• Yandex - Java is not supported (because NPAPI plug-ins are not supported)
• Brave - Java is not supported (because NPAPI plug-ins are not supported)
• Vivaldi - Java is not supported (because NPAPI plug-ins are not supported)
• tenFOUR Fox - Java is not supported (because plug-ins are not supported)

REMOVING THE JAVA PLUG-IN FROM YOUR OS

NOTE: Java applets will not work in your web browser and they never will until you reinstall Java. Only follow these instructions if you will never use Java on the internet. If you are unsure simply switch off Java in all your web browsers.

1. Go to Macintosh HD > Library > Internet Plug-Ins folder and remove/delete any of following items if they are present:
• JavaAppletPlugin.plugin (alias/shortcut)
• JavaAppletPlugin.plugin
• JavaPluginCocoa.bundle
2. Go to Macintosh HD > Users >your home directory > Library > Internet Plug-Ins folder too and remove/delete any of the above items if they are present.

NOTE: If there are multiple users on your computer you should remove the plug-in from each user account's Library.
NOTE: If you have OS X 10.7 or later your user Library folder is hidden. It can be accessed by going to the Go menu > Library while holding down the alt (option) key.

Article Keywords: Mac OS X OSX 100 101 102 103 104 105 106 107 108 109 1010 1011 macOS 1012 Cheetah Puma Jaguar Panther Tiger Leopard Snow Leopard Lion Mountain Lion Mavericks Yosemite El Capitan Sierra Macintosh Security Mac secure old older not supported out of date out-of-date operating system systems OS PowerPC PPC

Kyocera ecosys fs 4000dn drivers for mac pro. Kyocera printer drivers. After the first copy has been reviewed, the remaining copies.

This article is © MacStrategy » a trading name of Burning Helix. Apple, the Apple logo, and Mac are trademarks of Apple Inc., registered in the U.S. and other countries. App Store is a service mark of Apple Inc. As an Amazon Associate I earn from qualifying purchases.

Starting with Firefox version 49, Firefox requires Mac OS X 10.9 (Mavericks) or higher. Visit this Apple Support page to find your Mac OS version.

If you're using an outdated version of Firefox on Mac OS X 10.8 (Mountain Lion) or earlier, the only way you can update Firefox to a secure version is to upgrade your Mac OS to a version that Apple supports. Visit this Apple Support page to learn more about upgrading your Mac.

While insecure versions of Firefox will continue to work on OS X 10.8 and earlier, using an up-to-date version of Firefox on a supported version of Mac OS will provide you with the best and safest user experience.